DEPARTMENT OF TRANSPORTATION

STATE OF WISCONSIN

APPROVED

DATE

FHWA

66

ALL BAR STEEL REINFORCEMENT SHALL BE EMBEDDED 2 INCHES CLEAR UNLESS OTHERWISE SHOWN OR NOTED.

PRECAST REINFORCED RISERS SHALL HAVE A TONGUE AND GROOVE JOINT WITH TONGUE UP OR DOWN.

GENERAL NOTES

24

2418

12

2.5X3-FT

2X3-FT

DETAIL "A"

EQUIVALENT CAPACITY AND STRENGTH.

SUBMITTED TO THE ENGINEER FOR APPROVAL PROVIDING THAT SUCH ALTERNATE DESIGNS MAKE PROVISION FOR

DETAILED DRAWINGS FOR PROPOSED ALTERNATE DESIGNS FOR UNDERGROUND DRAINAGE STRUCTURES SHALL BE

LETTER DESIGNATES THE TYPE OF COVER TO BE USED TO COMPRISE THE COMPLETE UNIT.

"INLETS 2X3-H", ETC. THE FIRST NUMBERS DESIGNATES THE SIZE OF THE STRUCTURE, AND THE FOLLOWING

ALL DRAINAGE STRUCTURES ARE DESIGNATED ON THE PLANS AS "MANHOLES 3X3-L", "CATCH BASINS 4-B",

F ALL H’S

X

X2.5

2 3

3

TYPE

INLET COVER

2X3-FT

2.5X3-FT

WIDTH W (FT)

OVERHANG IS NOT REQUIRED ON PRECAST STRUCTURES WITH AN INTEGRAL OR MONOLITHIC BASE.

4" OVERHANG IS REQUIRED WHEN SEPARATE PRECAST BASE IS PROVIDED.

4" OVERHANGING BASES ARE REQUIRED FOR CAST-IN-PLACE REINFORCED CONCRETE AND CONCRETE BLOCK INSTALLATIONS.

3" MIN. (TYP)

PIPE MATRIX

SIZE

BASIN

CATCH

BASIN SIZE

CATCH

CATCH BASIN COVER MATRIX

ALL PRECAST CATCH BASIN UNITS SHALL CONFORM TO THE PERTINENT REQUIREMENTS OF ASTM C 913.

PIPE WALL

OUTSIDE

OUTSIDE PIPE WALL

DEP

TH

AS

SH

OW

N

ON

PL

AN

S

L

SECTION B-BSECTION A-A

DEP

TH

AS

SH

OW

N

ON

PL

AN

S

CONCRETE

6" MIN.

BLOCK

4" MIN.

DEP

TH

AS

SH

OW

N

ON

PL

AN

S

L

CONCRETE

REINFORCED

CAST-IN-PLACE

4" MIN.

JOINT

CONSTRUCTION

5" 5" 5"

CATCH BASINS 2X3-FT AND 2.5X3-FT

AND 2.5X3-FT

CATCH BASINS 2X3-FT

2’ MIN. 2’ MIN.

MORTAR

PIPE

DISCHARGE

PLASTER COAT

�" CEMENT

MORTAR

PIPE

DISCHARGE

A A

W

B B

6" MIN.5"

5"

BASE

4" OVERHANGING

PIPE. SEE DETAIL "A". ASSUMES PIPE ENTERS PERPENDICULAR TO THE STRUCTURE.

MAXIMUM INSIDE PIPE DIAMETER DETERMINED BY 3" CLEARANCE ON EACH SIDE OF THE OUTSIDE WALL OF THE

4" MIN.

WALL

PRECAST

MORTAR

BED OF

5"

MONOLITHIC BASE

CONCRETE WITH

REINFORCED

PRECAST

INTEGRAL BASE

CONCRETE WITH

REINFORCED

PRECAST

CONCRETE BASE

PRECAST REINFORCED

CAST-IN-PLACE WITH

CONCRETE BLOCK ON

THE PERTINENT REQUIREMENTS OF THE STANDARD SPECIFICATIONS AND THE APPLICABLE SPECIAL PROVISIONS.

DETAILS OF CONSTRUCTION, MATERIALS AND WORKMANSHIP N0T SHOWN ON THIS DRAWING SHALL CONFORM TO

PLAN VIEWPLAN VIEW

CONCRETE BASE OPTION

SEPARATE PRECAST REINFORCED

THE ENGINEER.

DELIVER PRECAST CATCH BASIN UNITS REQUIRED FOR THE PROJECT UNTIL A LIST OF SIZES IS FURNISHED BY

UNLESS OTHERWISE AUTHORIZED IN WRITING BY THE ENGINEER, THE CONTRACTOR SHALL NOT ORDER AND

5" 5"

5"

5" 5"

WIDTH (IN) LENGTH (IN)

FOR TWO PIPES

MAXIMUM INSIDE PIPE DIAMETER

LENGTH L (FT)

KEYWAY

1

1 FOR PRECAST CATCH BASINS PROVIDE REINFORCING STEEL IN ACCORDANCE TO ASTM C 913.

TO ASTM C 990 (TYP)

RECOMMENDATIONS CONFORMING

PER SEALANT MANUFACTUERS

WITH A BUTYL RUBBER SEAL

RISER JOINTS TO BE SEALED

1

2

2

1" CONCRETE KEY POURED AFTER INSTALLATION. 2’ SUMP MEASURED FROM TOP OF KEY.3

3

3

CAST-IN-PLACE STRUCTURES.

CONTRACTOR TO PROVIDE DRAWING(S) STAMPED BY A PROFESSIONAL ENGINEER FOR STEEL REINFORCING DESIGN FOR

W

S.D.D. 8

A

9-2

S.D.D. 8

A

9-2

SUPPORT FOR THE ENTIRE AREA OF THE BASE.

REQUIREMENTS OF FOUNDATION BACKFILL. THIS BEDDING SHALL BE COMPACTED AND PROVIDE UNIFORM

BASES SHALL BE PLACED ON A BED OF MATERIAL AT LEAST 6 INCHES IN DEPTH, WHICH MEETS THE

UNIT SUPERVISOR

ROADWAY STANDARDS DEVELOPMENT

/S/ Rodney TaylorSept., 2016

SDD 8a9 Catch Basins 2x3-FT and 2.5x3-FT

Version 2 Standard Detail Drawing 8A9 October 3, 2016

Catch Basins 2x3-FT and 2.5x3-FT

References:

FDM 13-25-30

Bid items associated with this drawing:

ITEM NUMBER DESCRIPTION UNIT

611.1230 Catch Basins 2x3-FT ..................................................................................... EACH 611.1253 Catch Basins 2.5x3-FT .................................................................................. EACH

Standardized Special Provisions associated with this drawing:

STSP NUMBER TITLE

NONE

Other SDDs associated with this drawing:

SDD 8A5 Inlet cover sheets "a" and "c"

SDD 8D17 Manholes, Manhole and Inlet Covers

Design Notes:

Guidelines for matching catch basin opening size and inlet covers are provided on the front side of this SDD.

A pipe matrix on the front side of this SDD provides guidance for selecting the maximum inside pipe diameter. The inside pipe diameter was determined by the pipe entering perpendicular to the structure at 90°. Pipes entering at a skewed angle should be evaluated on a case by case basis.

If a sump depth greater than 2' is required this must be specified in the miscellaneous quantities comments.

Catch Basins should be used only on projects that have a maintenance agreement for cleaning the sumps. Catch basins should not be used in municipalities that do not want them because of insect control.

Contact Person:

Ed Lilla (608) 266-2312